Description

The Caverns of Sonora and remarkable for their stunning arrays of calcite crystal formations, especially the helictites. According to Wikipedia, "he founder of the National Speleological Society, Bill Stephenson, said of the cave after his first visit: 'This is the most indescribably beautiful cave in the world, its beauty cannot be exaggerated, not even by a Texan.'"

There are at least 7 miles of explored passageways with about 2 miles of developed trails.